HK20996A - Fast walsh transform processor - Google Patents

Fast walsh transform processor

Info

Publication number
HK20996A
HK20996A HK20996A HK20996A HK20996A HK 20996 A HK20996 A HK 20996A HK 20996 A HK20996 A HK 20996A HK 20996 A HK20996 A HK 20996A HK 20996 A HK20996 A HK 20996A
Authority
HK
Hong Kong
Prior art keywords
transform processor
walsh transform
fast walsh
fast
processor
Prior art date
Application number
HK20996A
Other languages
English (en)
Inventor
Paul W Dent
Original Assignee
Ericsson Ge Mobile Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ericsson Ge Mobile Inc filed Critical Ericsson Ge Mobile Inc
Publication of HK20996A publication Critical patent/HK20996A/xx

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/14—Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
    • G06F17/145—Square transforms, e.g. Hadamard, Walsh, Haar, Hough, Slant transforms

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Data Mining & Analysis (AREA)
  • Algebra (AREA)
  • Software Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Complex Calculations (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
HK20996A 1991-07-25 1996-02-01 Fast walsh transform processor HK20996A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/735,805 US5357454A (en) 1991-07-25 1991-07-25 Fast walsh transform processor

Publications (1)

Publication Number Publication Date
HK20996A true HK20996A (en) 1996-02-09

Family

ID=24957258

Family Applications (1)

Application Number Title Priority Date Filing Date
HK20996A HK20996A (en) 1991-07-25 1996-02-01 Fast walsh transform processor

Country Status (6)

Country Link
US (1) US5357454A (xx)
DE (1) DE4224530B4 (xx)
FR (1) FR2679722A1 (xx)
GB (1) GB2258746B (xx)
HK (1) HK20996A (xx)
SE (1) SE515268C2 (xx)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5550809A (en) * 1992-04-10 1996-08-27 Ericsson Ge Mobile Communications, Inc. Multiple access coding using bent sequences for mobile radio communications
US5295153A (en) 1992-04-13 1994-03-15 Telefonaktiebolaget L M Ericsson CDMA frequency allocation
JP3406319B2 (ja) 1994-02-17 2003-05-12 プロキシム，インク． 高速データ伝送無線ローカル・エリア・ネットワーク
US5574675A (en) * 1994-03-22 1996-11-12 Industrial Technology Research Laboratories State-controlled half-parallel array walsh transform
US5784293A (en) * 1994-11-03 1998-07-21 Motorola, Inc. Apparatus and method for determining transmitted modulation symbols
US5604806A (en) * 1995-01-20 1997-02-18 Ericsson Inc. Apparatus and method for secure radio communication
US5909460A (en) 1995-12-07 1999-06-01 Ericsson, Inc. Efficient apparatus for simultaneous modulation and digital beamforming for an antenna array
US5894473A (en) * 1996-02-29 1999-04-13 Ericsson Inc. Multiple access communications system and method using code and time division
US6330291B1 (en) 1996-03-29 2001-12-11 Qualcomm Inc. Frequency tracking for communication signals using M-ary orthogonal walsh modulation
US5856935A (en) * 1996-05-08 1999-01-05 Motorola, Inc. Fast hadamard transform within a code division, multiple access communication system
US5862182A (en) * 1996-07-30 1999-01-19 Lucent Technologies Inc. OFDM digital communications system using complementary codes
US6452958B1 (en) 1996-07-30 2002-09-17 Agere Systems Guardian Corp Digital modulation system using extended code set
US6404732B1 (en) 1996-07-30 2002-06-11 Agere Systems Guardian Corp. Digital modulation system using modified orthogonal codes to reduce autocorrelation
US5831977A (en) * 1996-09-04 1998-11-03 Ericsson Inc. Subtractive CDMA system with simultaneous subtraction in code space and direction-of-arrival space
US5768307A (en) * 1996-09-13 1998-06-16 Telefonaktiebolaget Lm Ericsson Coherent demodulation with decision-directed channel estimation for digital communication
KR100514682B1 (ko) * 1997-06-30 2005-11-25 주식회사 팬택앤큐리텔 왈시코드발생방법
US6028889A (en) * 1998-02-25 2000-02-22 Lucent Technologies, Inc. Pipelined fast hadamard transform
FR2782425B1 (fr) * 1998-07-31 2000-10-13 France Telecom Procede et dispositif de codage correcteur d'erreurs et procede et dispositif de decodage correspondant
US6526091B1 (en) 1998-08-17 2003-02-25 Telefonaktiebolaget Lm Ericsson Communication methods and apparatus based on orthogonal hadamard-based sequences having selected correlation properties
FR2784525B1 (fr) * 1998-10-12 2006-07-28 Cit Alcatel Procede d'allocation de codes orthogonaux dans un systeme de radiocommunications mobiles du type a acces multiple par repartition de codes utilisant des codes de longueur variable
US6163524A (en) * 1998-10-19 2000-12-19 Telefonaktiebolaget Lm Ericsson (Publ) Code allocation in CDMA
US6505224B1 (en) * 1999-09-29 2003-01-07 Sun Microsystems, Inc. System and computer-implemented method for performing multi-stage fast Walsh transform
EP1236086A2 (en) * 1999-12-10 2002-09-04 Broadcom Corporation Apparatus and method for reducing precision of data
US6661834B1 (en) 2000-04-17 2003-12-09 Rf Micro Devices, Inc. Carrier recovery for spread spectrum communications
US6674818B1 (en) 2000-04-17 2004-01-06 Rf Micro Devices, Inc. Reduced complexity decision circuitry
US6693954B1 (en) * 2000-04-17 2004-02-17 Rf Micro Devices, Inc. Apparatus and method of early-late symbol tracking for a complementary code keying receiver
US6895421B1 (en) 2000-10-06 2005-05-17 Intel Corporation Method and apparatus for effectively performing linear transformations
US6766342B2 (en) * 2001-02-15 2004-07-20 Sun Microsystems, Inc. System and method for computing and unordered Hadamard transform
KR100424538B1 (ko) * 2001-05-29 2004-03-27 엘지전자 주식회사 이동통신시스템에서의 스크램블링 코드 생성 장치 및 방법
GB2380829A (en) * 2001-10-12 2003-04-16 Siroyan Ltd Organization of fast fourier transforms
US7308019B2 (en) * 2002-05-20 2007-12-11 Telefonaktiebolaget Lm Ericsson (Publ) System and method for Fast Walsh Transform processing in a multi-coded signal environment
US20080109507A1 (en) * 2006-10-23 2008-05-08 L3 Communications Integrated Systems, L.P. System and method for performing an optimized discrete walsh transform
WO2008157679A1 (en) * 2007-06-19 2008-12-24 Raytheon Company Methods and apparatus for receiver having fast walsh transform
CN103488612B (zh) * 2013-09-17 2016-08-24 浙江工业大学 一种应用于数字滤波的沃什-新梅森数快速变换方法
RU2576591C2 (ru) * 2014-04-24 2016-03-10 Александр Васильевич Горепёкин Способ и устройство преобразования сигнала произвольной формы
RU2682862C2 (ru) * 2017-03-06 2019-03-21 Роман Александрович Горепекин Способ и устройство преобразования сигнала произвольной формы с использованием ступенчатых пилообразных функций
US11502715B2 (en) * 2020-04-29 2022-11-15 Eagle Technology, Llc Radio frequency (RF) system including programmable processing circuit performing block coding computations and related methods

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3925646A (en) * 1974-04-19 1975-12-09 Battelle Memorial Institute Information and process control enhancement system employing series of square wave components
US3956619A (en) * 1975-03-31 1976-05-11 General Electric Company Pipeline walsh-hadamard transformations
EP0128298B1 (en) * 1983-04-11 1990-07-04 Nec Corporation Orthogonal transformer and apparatus operational thereby
US4601006A (en) * 1983-10-06 1986-07-15 Research Corporation Architecture for two dimensional fast fourier transform
FR2645985B1 (fr) * 1989-04-18 1994-08-05 Labo Electronique Physique Circuit pour operer une transformation lineaire de donnees numeriques

Also Published As

Publication number Publication date
DE4224530B4 (de) 2004-09-09
SE9202209D0 (sv) 1992-07-20
GB2258746A (en) 1993-02-17
SE9202209L (sv) 1993-01-26
US5357454A (en) 1994-10-18
SE515268C2 (sv) 2001-07-09
FR2679722B1 (xx) 1994-12-02
FR2679722A1 (fr) 1993-01-29
GB2258746B (en) 1995-02-15
DE4224530A1 (de) 1993-01-28
GB9215557D0 (en) 1992-09-02

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PE Patent expired

Effective date: 20120721